Which of the following reactions involve combination
of a compound and an element
a. N2+3H2---->2NH3
b.CaO+CO2------>CaCO3
c.2SO2+O2--------> 2SO3
c.NH3+HCl-------> NH4Cl
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Answer:
option c is the correct answer.
because SO2 is a compound while O2 is an element.
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